Paper-utensil-forming die



Feb. 17, 1931. P. F. HEYEs 1,793,089

PAPER UTENSIL FORMING DIE INVENTOR f2# ig/mwyf J ATTORNEY Feb. 17, 1931.p. F, HEYES 1,793,089

PAPER UTENSIL FORMING DIE Filed July 12. 1928 2 Sheets-Sheet 2 INVENTOR@@ffyff.

ATTORNEY Patented Feb. 17, 1931l UNITED AsTAa'lfle:fs PATENTv oFFi'cErenner FURLONGHEYES, or TORONTO, ONTARIO, oANAnA, AssIeNorv To sInNnYTORRANCE Vnaires, or TORONTO, ONTARIO, oANAnA` i PAPEB-UTENSIL-FGRMING'DIE Application lcd July 12, 1928. Serial No. 292,081.

This `invention relates to improvements in paper utensilmolding dies, asdescribed in the present specication and illustrated'` in theaccompanying drawings ,which form part vg-Of the same. i y

The .invention consists essentially ofthe novel features pointedoutbroadlyand spe- 'ciiically in the claim for novelty fol-lowingadescription containing` an explanation in detail of an acceptable formofthe invention. A

Thefobjects of the invention are to constructan improved form of papermolding die in which the article is stamped, formed and finished in theone operation; to ensure a @clean cut edge on the finished product,thereby reducing the number of culls; to prevent 'distortion in thearticle when it is being formed or sheared from theI paper stock.; toreduce the labor` upkeep costs; to simplify the mechanism required andreduce the power consumption; and generally, 'toprovide a paper utensilmolding die, simple in operation and capable of accomplishing theaforesaid purposes. j

In the drawings, Figure 1 isa rearelevational view ofthe invention. i, YY

Figure 2 is an enlarged frontV elevational .view with parts in sectionto disclose the different working parts.v` Y ,c

Figure 3 isa section view taken yon line 3-3in Figure 1. Y. 4 Figure4 asection view takenl on line 4-4 inrFigure 3,. A e5 l i responding partsin thevarious `figures.`

Referring to the drawings, 10 represents the invention complete,consisting-of the male die'V 11 reoiprocally mounted in the maledieholder 12, and the female die'13 reciprocally mounted in the femaledieholder 14, having the flange 15 ,formed atAitsabasesecuredgto y Ythebaseplatefl of the usual press in which V.these dies are mountedz 17 isa shaft formed the plunger of the press and actuating. the

member 12; Lugs or extended portions 184 on the male Edie holder 12 Vandsecured toV secured to the fiange, 15 `extend upwardly therefrom andenter the opening 19 andform a snug lit therewith when the member 12 islowered by the cam or crank mechanism of the press, and serve as meansfor guiding the Vdie 11 into its properposition with the die 13 whenforming the utensil.

The male die 11 is formed with the parallel sides 23 and iits snuglyinto the recessed portion 24 of the member 12 and is reciprocallymounted therein.` The upper side of the member 12 is enclosed by the web25. At

Vregular intervals in the webv 25 are countersunkopenings 26, and a bolt27 is reoiprocally `mounted inthe central Opening 28 in the countersunlrportion 26. The bolt head 27A rests on the shoulder 29 of thecountersunk portion. The bolt 27 is threaded into the vmale die 11 as at30. Compression springs 31 encircling the bolts 27 impinge against theupper face 32 of thedie 11 and against the underface Ofthe web 25`andtend tov retain the die 11 in spaced relation therefrom. An

Velectric heating element 34 is placedin the recessed portion 35 in themale'die 1l and properly insulated therefrom and has the J properlyinsulated leads 36 and36A leading vout through the web 25 to the sourceof electrical energy. j

A plate 38 secured to the male die 11 by the [screws 39 protects theheating element 34 and retains it in place. A flat circular ejectorplate 40 is centrallylocated in the under face cf the die 11 and recedesinto the recessed por- Y c i, Y l ,c Y tion 41 of the die 11 when theforming action Lilie numerals of reference Aindicate co'rtakes place.`A` plunger 42 is secured to the ing 43 in the die 11 and is reciprocallymount ed therein.- An adjusting nut 45 and a lock jnut 46 are threadedon said plunger. A reduced portion 42A of the plunger extends upwardlyand is reciprocally mounted in the opening 48 in the web 25.Acompression spring 49 impinges against the nutV 46 and againstvtheunder face of the web 25 and serves to actuate the ejector plate 40.

, The female die 13 is formed with the par- Y allel side walls 51 whichform aV snug fit with the inner walls 52A of the recessed portion 52v,formed the member `and vr eci p rocally` mounted therein. A heatingelement 34A is mounted in the groove 35A formed in the under face of thefemale die 13 and is properly insulated therein and has the leads 36Band 36C properly insulated and let out through an opening formed in theend wall or web 53 in the member 14 and to the source of electricenergy. A plate 33A secured tothe un-4 der face of the die 13 by thebolts 39A serves to protect and to retain the heating element,

34A in place. A shaft 60 extends downwardly through a central opening 62formed through the plate 61 and forms a snug lit in said opening and isreciprocally mounted therein. An adjusting nut 63 having a lock nut 64is threaded onto the shaft 60 and supports a washer 65A mounted on saidshaft.

A strong compression spring 65 impinging against the under face of theplate 61 and against the washer 65A serves to resiliently retain saidplate 61 against the under face of the web 53 and to retain the femaledie 13 substantially in the position shown in Figures 1 and 2, and toresist the downward pressure of the male die thereon and to compress thesprings 31 until the paper utensil is formed. The pressure of thesprings 31 on the male die 11 is then great enough to overcome thepressure of the spring 65 and the male die forces the female die torecede into the recess 52. The walls 23 of the male die conform with andform a snug fit with the side walls of the recess 52 and may reciprocatetherewith.

Bolts 67 are threaded upwardly into the die 13 and carrying cylindricalspacers 63, pass through openings 69 in the plate 61 and have the nuts70 threaded onto the lower portion thereof. The spacers 68 arereciprocally mounted through openings 71 in the web53 and serve toretain the die 13 in spaced relation with the plate 61. An ejector plateA is centrally mounted in the upper face of the die 13 and is adapted torecede into the recess 41A when the paper utensils are being formed. Aplunger 42BA issecured to the underside of the plate 40A and xtendsdownwardly through the centrally located opening 43A andl isreciprocally mounted therein. Lock nuts and adjusting nuts A and 46A,respectively, are threaded onto the plunger 42B. The reduced portion 42Cof the plunger 42BL extends downwardly and into a centrally locatedopening 48A in the web 53 and the shaft and is reciprocally mountedtherein. A compression spring 49A impinging against the upper face oftheweb 53 and against the nut 46A, serves to actuate the ejector 40A.

The upper and inner corner 7 5' of the side walls of the member 14 aresharpened and form a shearing edge. The lower edge 7 6 of the side walls23 of the die 11 is sharpened and forms a shearing edge which slidespast the edge 7 5 as the male die 11 is forced down into the recess 52in the member 14. Thus we see that the edge 7 6 and the edge 75 formco-acting shearing members and serve to shear the stamped paper utensilfrom the paper stock. In order to ensure perfect vertical shear, aportion 77 on the under face of 4he die 11 and adjacent the edge 76 isformed at right angles to the sides 23 and extends inwardly a slightdistance. A similarly flattened portion 7 8 is formed on the upper faceof the female die 13 and adjacentthe outer periphery of said die 13.

In order to remove the finished utensil from the dies, a dog ispivotally mounted on the side of the member 12 as at 91, and isadaptedto slide past a trigger 92 on the downward stroke and to depresssaid trigger 92 on the upward stroke, thus opening the valve at 92A toallow a blast of air to be forced thro-ugh the hose 93 and the nozzle94. A hose 95 leads to any compressed air storage tank and connectsthrough the valve 92A actuated by the trigger 92 to the hose 95. 96 is aplatform supporting the paper stock 97 being led into contact with thedies.

In the drawings, an electric heating element is shown mounted in themale die 11 and in the female die13, but it is to be understood that anyof the known heating means, such as steam or-gas, may be successfullyused to heat the dies without departing from the scope of thisinvention.

In the operation of this invention, the dies with their supports orholders, are mounted on a suitable press, and the female die holder 14is preferably secured to the base plate, as mentioned above, whilef themale die holder 12 is secured to the reciprocating part of the presswhich is actuated by the cam or crank mechanism. The paper stock 97 isfed between the dies 11 and 13 from any convenient direction, and theamount fed in is controlled by the usual feeding mechanism, well knownto the art. On the downward stroke of the male die, the ejectors 40 and40A on coming in contact with the paper stock are forced into theirrespective recesses 41 and 41A and the paper stock is formed to conformwith the surfaces of the die. At the same time, the stock is heated bythe dies and considerable pressure is exerted by said dies so that theutensil will retain its form after removal from the die. The compressionspring 65 retains the female die in the position shown in Figures 1 and2 until the paper utensil is formed. The pressureA exerted by thesprings 31 on the male die 11 then overcomes the pressure of the spring65 exerted on the female die 13 andforcesl said female die along withthe paper utensil, downwardly into the recessv52. The shearing edge 7 6carried on the outer periphery of the male die 11 then coacts with theshearing edge 75 carried on the inner edge of the female die holder 14and shears the'utensil from the paper stock. The "3"/ male die 11 isforced downwardly a slight distance into the recess 52. The upwardstroke now commences, and when the male die reaches the positionadjacent its extremity of upper travel, the ejectors 4() and 40A forcethe utensil out of contact with the dies 1l and 13, respectively, andthe dog 90 actuates the trigger 92 to depress the valve in the hose 95to allow a blast of air to be forced 19 from the nozzle 94 and blow theutensil away from the dies, substantially in a direction at right anglesto the direction of travel of the paperv stock.

What I claim is:

In paper utensil formingdies, male and female dies having cooperatingshearing edge-s and spring pressed and spring cushioned respectively,ejecting members operating on the release of pressure on said springsand a valve controlled tubular passage and nozzle having an operatingtrigger and connected to a compressed air supply and directed to theejected pressed article at an A angle to the line of travel of the lfedin material.

Signed at the city of Toronto, this th day of April, 1928. Y

PERCY FURLONG HEYES.

